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                [Ceoi2012]network                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><div style="text-indent: 21pt"><span style="font-size: medium">给出一个有向图，有n个顶点，m条边。</span></div>
<div style="text-indent: 21pt"><span style="font-size: medium">如果从p到q有一条唯一的路径，则称顶点p可以到达顶点q。</span></div>
<div style="text-indent: 21pt"><span style="font-size: medium">图中有一个中心点r，它可以到达所有顶点。</span></div>
<div style="text-indent: 21pt"><span style="font-size: medium">&nbsp;</span></div>
<div><span style="font-size: medium"><b>任务</b></span></div>
<div style="text-indent: 21pt"><span style="font-size: medium">(A)求出每个顶点能够到达的顶点数量(包括自身)</span></div>
<div style="text-indent: 21pt"><span style="font-size: medium">(B)最少加多少条边，使得所有顶点之间均可以相互到达</span></div>
<div style="text-indent: 21pt"><span style="font-size: medium">&nbsp;</span></div></p><hr/><h3>输入格式</h3><p><div style="text-indent: 21pt"><span style="font-size: medium">第1行:3个整数n(1 n 100,000) , m(1 m 500,000),。顶点编号从1..n编号，有向边编号从1..m编号，R(1 R&lt;n)是图的中心点编号。</span></div>
<div style="text-indent: 21pt"><span style="font-size: medium">接下来m行，每行2个整数，分别表示一条有向边的开始到结束点</span></div>
<div style="text-indent: 21pt"><span style="font-size: medium">&nbsp;</span></div></p><hr/><h3>输出格式</h3><p><div style="text-indent: 21pt"><span style="font-size: medium">第1行: 1个整数，分别表示第i个整数可到达的顶点数量。</span></div>
<div style="text-indent: 21pt"><span style="font-size: medium">第2行：1个整数，表示最少需要添加的边的数量X。</span></div>
<div style="text-indent: 21pt"><span style="font-size: medium">接下来X行，每行2个整数，表示添加的一条有向边。</span></div></p><hr/><h3>样例输入</h3><pre>11 12 3 
3 2 
2 1 
2 4 
4 5 
4 6 
6 2 
6 7 
3 8 
8 9 
9 10 
9 11 
10 8
</pre><hr/><h3>样例输出</h3><pre>1 6 11 6 1 6 1 4 4 4 1
5 
1 3 
5 4 
7 6 
11 9 
8 3
</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>鸣谢Ydc提供SPJ</p>
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